DNxHD Settings (revisited)

When to use each variant?

  • [http://www.avid.com/US/about-avid/customer-stories/Taking-Woodstock-Small-Family-Drama-Precise-HD-Editing]
    • Footage was telecined to HDCAM and digitized to
      •  DNxHD 36 format, which offers compact storage of crisp HD images and was essential for laptop-based HD editing.
      • DNxHD 115 was used occasionally for detailed wide shots, often for crowd scenes.
  • [http://www.studiodaily.com/blog/?p=97]
    • The Avid codecs allow you to select the color space (709 or RGB) and I believe that is why the RGB-YUV conversions are apparently handled better by the Avid codecs.
      • Something to keep in mind when embarking on projects that may require material to meander into the RGB space.
    • The big surprise for me was the performance of Avid’s DNxHD 36 codec.  (Only) 3.5% of the original file size… and look at how amazing it did.
      • Since it’s a progressive-only codec, I couldn’t run it on my second set of tests.
  • [http://community.avid.com/forums/p/44088/248040.aspx#248040]
    • DNxHD 185 X is a 10-bit version of DNxHD 185.
  • [http://community.avid.com/forums/p/17160/96889.aspx#96889]
    • 1080i/50 HDV is 1440 x 1080, as is DNxHD-TR 120.
      • TR means “Thin Raster” reflecting the fact that if viewed on the assumption of square pixels, the subjects would look thin, since really the pixels are “fat”.
    • 1080i/50 is 1920 x 1080, as is DNxHD 185 and DNxHD 120
    • Throughput: 185Mb/sec for DNX185 = 23MB/sec.
  • [http://community.avid.com/forums/p/50032/280966.aspx#280966]
  • DNxHD 36 is great..BUT (as of 2007) only works in 1080p/23.98.  Why not 720p/59.94  or 1080i/59.94 ??   Answer: The format was created for the film-offline-HD crowd, thus the limited 1080p support.

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